Expression pedal database and how they work

The polarity and resistance settings for the following manufacturer Effect units/MIDI controllers/Keyboards have been sourced from device testing as well as manufacturer websites, manuals and inquiries.

Care has been taken compiling this table. However it is recommended that the manufacturer be contacted for confirmation

Manufacturer

Polarity

Resistance
(K ohm)
minimum to maximum

Control Voltage1
(volts)
minimum to maximum

Arturia®

Not applicable

Not Applicable

-5 - 10 volts

Avid (Eleven rack)®

TRS

10 - 100

Not Applicable

Behringer®

RTS

50 - 100

Not Applicable

Boss®

TRS

105

Not Applicable

Catalinbread®

TRS

10 - 100

Not Applicable

Digitech®

RTS

10 - 100

Not Applicable

Digitech®

TS

250 minimum

Not Applicable

Earthquaker®

TRS

50 - 100

Not Applicable

EHX®

TRS

10 - 100

Not Applicable

Ensoniq® SQ1/SQ2

Not applicable

Not Applicable

0 - 10 volts

Fairfield Circuitry ®

TRS

10 - 50

Not Applicable

Fractal Audio Systems®

TRS

10 - 100

Not Applicable

Eventide®

TS

5 - 25

Not Applicable

Kemper®

TRS or RTS4

10 - 100

Not Applicable

Line 6®

TS

10 - 15

Not Applicable

M-Audio®

TRS

10

Not Applicable

Magnatone®

TRS

25 - 250

Not Applicable

Mooer®

TRS

10 - 100

Not Applicable

Mooger Fooger®2

Not applicable

Not Applicable

0 - 5 volts

Mooger Fooger®2

TRS

50 - 100

Not Applicable

MXR®

TRS

10

Not Applicable

Pigtronix®

TRS

10 -100

Not Applicable

Ramble FX® (Kismet)

TRS

10 - 1006

Not Applicable

Ramble FX® (Kismet)

CV

Not Applicable

0 - 5 volts

Red Panda

TRS

10 - 50

Not Applicable

Strymon®

TRS

25 - 100

Not Applicable

TC Electronic®

TRS

25 – 50 (25 preferred3)

Not Applicable

TC Helicon®

TRS

10 - 50

Not Applicable

Walrus Audio

TRS

10 - 100

Not Applicable

Yamaha®

RTS

50 - 100

Not Applicable

Zoom®

RTS

20 - 100

Not Applicable

1Some devices require a dedicated control voltage from a CV pedal, rather than a variable resistance from an expression pedal2Mooger Fooger® effects can use either a CV pedal or an expression pedal325k ohm gives a better sweep response for TC Electronic®4Polarity is configurable within the Kemper® device5There are many Boss® pedals so it is difficult to try all of them. 10k ohm is the recommendation and will work with all Boss pedals.
However, up to 100K ohm for example works correctly with the PS-5 Harmoniser, but does not with the PS-3 Phase shifter, Up to 50k will probably work for all Boss® pedals6Kismet from Ramble FX is also designed to work with a 250K volume pedal using a Y-splitter cable